I knew several folks that had Exiges (I had an Elise for many years). It's an incredibly fun car with absolutely no practicality at all. No trunk (the Elise at least had a tiny one that you could fit a couple of bags of groceries in, or a briefcase). No visibility out the back. And I don't mean limited, I mean zero--the top bits of the engine completely block the rear "window." Several owners I know actually added rear view cameras. In order to get in and out (especially with the fixed-top Exige), it is helpful if you're a member of the Cirque de Soleil. Also, if you have any loose fillings, you should avoid any severe bumps. The seats are one piece, form fitting and lightly padded, and only adjust fore and aft. If you don't like them, or their relative position to the wheel and pedals, you'll be unhappy. For me, I found them just fine (I'm average height and weight) even for 2-3 hour drives.
OTOH, more fun than a barrel of monkeys, especially on the track (if you have one handy). Handling and steering are far sharper than any other car I've ever driven or owned. My Elise was the best of both worlds--I had an aftermarket supercharger on it that took the horsepower up above what the Exige has, and made it so the second cam kicked in at 4000 rpm instead of 6000. So I had the power of the Exige with the (slightly) more comfortable ride and handling of the Elise, and some luggage space. Also, the Elise's top is removable, whereas the Exige's is designed to be fixed (although I know some owners who modded it so it could be removed).
They are incredible cars, although I wouldn't recommend it as your only car. But if it's a grail car, surely you'd have something more practical already.
I still miss mine sometimes...